You can either wait for the binaries to be released or if you’re in a rush then you can find instructions on building the binaries for yourself in the earlier article: “MySQL Cluster 7.0.7 source released“.

A description of all of the changes (fixes) that have gone into MySQL Cluster 7.0.8 (compared to 7.0.7) can be found in the MySQL Cluster 7.0.8 Change Log.